📢 Snackbar

<div class="snackbar-dark">
  <span class="snackbar-text">File has been deleted</span>
  <button class="snackbar-action">UNDO</button>
</div>

.snackbar-dark {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  background: #1a1a2e;
  border-radius: 8px;
  color: white;
  width: 360px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}
.snackbar-text {
  font-size: 0.9rem;
  flex: 1;
}
.snackbar-action {
  background: none;
  border: none;
  color: #4facfe;
  font-weight: 700;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: background 0.2s;
}
.snackbar-action:hover {
  background: rgba(79, 172, 254, 0.1);
}
@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

<div class="snackbar-icon">
  <span class="snackbar-icon-symbol">✓</span>
  <span class="snackbar-text">Saved successfully</span>
</div>

.snackbar-icon {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background: white;
  border-radius: 50px;
  color: #1a1a2e;
  width: 280px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  border: 1px solid #e0e0e0;
  animation: slideUp 0.3s ease;
}
.snackbar-icon-symbol {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 12px;
  flex-shrink: 0;
}
.snackbar-text {
  font-size: 0.9rem;
  font-weight: 500;
}
@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

<div class="snackbar-gradient">
  <span class="snackbar-gradient-text">✨ Pro feature unlocked!</span>
  <button class="snackbar-gradient-btn">Try it</button>
</div>

.snackbar-gradient {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 10px;
  color: white;
  width: 320px;
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
  animation: slideUp 0.3s ease;
}
.snackbar-gradient-text {
  font-size: 0.9rem;
  font-weight: 600;
  flex: 1;
}
.snackbar-gradient-btn {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
  white-space: nowrap;
}
.snackbar-gradient-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}
@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}